Discordance between Clinical and Ultrasound Examinations in Juvenile Idiopathic Arthritis: An Experimental Approach oleh Francesco Licciardi, Marco Petraz, Carlotta Covizzi, Francesca Santarelli, Carlotta Cirone, Roberta Mulatero, Francesca Robasto, Marta Dellepiane, Silvana Martino, Davide Montin, Viviana Ravagnani